Behringer DI4000 V2 4-Channel Active Direct Box

The Behringer DI4000 V2 is built for working audio professionals who need to get four instruments onto a console cleanly and efficiently — whether that's a keyboard player running four synths at a festival, a studio engineer tracking a full band direct, or a broadcast technician feeding a clean mix feed to a recorder. The active circuitry does exactly what a DI should: it converts unbalanced, high-impedance instrument signals into balanced, low-impedance signals that travel long cable runs without picking up hum, RF interference, or the tonal degradation that comes from impedance mismatch. The result is a direct signal that retains the natural character of the instrument — the thump of a bass, the sparkle of an acoustic pickup — rather than the thin, mid-heavy sound you'd get from a poor impedance match.

The DI4000 V2 packs four channels into a rackmount unit, with per-channel +20dB gain switches and switchable input attenuation giving the operator meaningful control over the signal level entering and leaving the box. The gain switches are particularly useful in a live context where passive instruments with inconsistent output levels need to meet a console's nominal operating level without over-relying on mic preamp gain — which would drag up the noise floor along with the signal. The switchable attenuation keeps line-level sources in check, preventing input stage saturation from synths and keyboards that output at +4dBu or higher. For the price point, it offers a practical and tidy solution for any engineer managing a multi-source direct signal chain.